Kjell Helenius

ORCID: 0000-0002-6296-6797
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About
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Research Areas
  • Neonatal Respiratory Health Research
  • Infant Development and Preterm Care
  • Neonatal and fetal brain pathology
  • Congenital Heart Disease Studies
  • Child and Adolescent Health
  • Congenital Diaphragmatic Hernia Studies
  • Retinopathy of Prematurity Studies
  • Neuroscience of respiration and sleep
  • Ear Surgery and Otitis Media
  • Assisted Reproductive Technology and Twin Pregnancy
  • Emergency and Acute Care Studies
  • Preterm Birth and Chorioamnionitis
  • Global Maternal and Child Health
  • Congenital heart defects research
  • Tracheal and airway disorders
  • Infant Nutrition and Health
  • Maternal and Perinatal Health Interventions
  • Birth, Development, and Health
  • Cardiovascular Conditions and Treatments
  • Cancer-related Molecular Pathways
  • Infant Health and Development
  • Mechanical Circulatory Support Devices
  • Sinusitis and nasal conditions
  • Hedgehog Signaling Pathway Studies
  • Respiratory Support and Mechanisms

Turku University Hospital
2015-2025

University of Turku
2015-2025

Universidad de Salamanca
2021

Research Network (United States)
2020

Imperial College London
2019-2020

Academic Pediatric Association
2020

Royal Hospital for Women
2018

University of Toronto
2018

University of Otago
2018

University of Zurich
2018

OBJECTIVES: To compare survival rates and age at death among very preterm infants in 10 national regional neonatal networks. METHODS: A cohort study of infants, born between 24 29 weeks’ gestation weighing <1500 g, admitted to participating units 2007 2013 the International Network for Evaluating Outcomes Neonates. Survival was compared by using standardized ratios (SRs) comparing each network estimate whole population. RESULTS: populations differed with respect cesarean birth,...

10.1542/peds.2017-1264 article EN PEDIATRICS 2017-11-21

Abstract Objective To determine if postnatal transfer or birth in a non-tertiary hospital is associated with adverse outcomes. Design Observational cohort study propensity score matching. Setting National health service neonatal care England; population data held the Neonatal Research Database. Participants Extremely preterm infants born at less than 28 gestational weeks between 2008 and 2015 (n=17 577) grouped based on within 48 hours of birth: upward (non-tertiary to tertiary hospital,...

10.1136/bmj.l5678 article EN cc-by BMJ 2019-10-16

<b><i>Background:</i></b> There are significant international variations in chronic lung disease rates among very preterm infants yet there is little data on respiratory strategies. <b><i>Objective:</i></b> To evaluate practice the management of extremely born at < 29 weeks’ gestational age (GA) 10 neonatal networks participating International Network for Evaluating Outcomes (iNeo) Neonates collaboration....

10.1159/000487987 article EN Neonatology 2018-01-01

<h3>Objective</h3> To compare the rates of retinopathy prematurity (ROP) and treatment ROP by laser or intravitreal anti-vascular endothelial growth factor among preterm neonates from high-income countries participating in International Network for Evaluating Outcomes (iNeo) neonates. <h3>Methods</h3> A retrospective cohort study was conducted on extremely infants weighing &lt;1500 g at 24<sup>0</sup> to 27<sup>6</sup> weeks9 gestation who were admitted neonatal units Australia/New Zealand,...

10.1136/bjophthalmol-2016-310041 article EN British Journal of Ophthalmology 2017-03-07

Organisation of care, perinatal and neonatal management very preterm infants in the Nordic regions were hypothesised to vary significantly. The aim this observational study was test hypothesis.Information on 21 greater healthcare Denmark, Finland, Iceland, Norway Sweden gathered from national registers 2021. Preterm birth rates, case-mix, interventions, morbidity survival hospital discharge (<32 weeks) extremely (<28 weeks gestational age) compared.Out 287 642 born alive, 16 567 (5.8%)...

10.1111/apa.16753 article EN cc-by-nc Acta Paediatrica 2023-03-13

&lt;b&gt;&lt;i&gt;Introduction:&lt;/i&gt;&lt;/b&gt; This study aimed to evaluate how Close Collaboration with Parents (CC), a neonatal intensive care unit (NICU)-wide educational model for healthcare staff improve their family-centred practices, affects the length of stay (LOS), growth, and later hospital visits rehospitalizations preterm infants. &lt;b&gt;&lt;i&gt;Methods:&lt;/i&gt;&lt;/b&gt; register-based included all infants born below 35 weeks gestation in Finland from 2006 2020....

10.1159/000535517 article EN Neonatology 2024-01-01

Objective Size at birth is a key indicator of in utero growth. Our objective was to generate sex-specific percentiles for weight and head circumference neonates born between 22 29 weeks gestation from pregnancies without hypertension or diabetes assess differences vaginal caesarean births singletons twins. Methods We used data 12 countries participating the International Network Evaluating Outcomes Neonates database 2007 2021. excluded that were influenced by truncation with 1500g cut-offs...

10.1136/archdischild-2024-327845 article EN Archives of Disease in Childhood Fetal & Neonatal 2025-01-06
Tetsuya Isayama Satoshi Kusuda Brian Reichman Shoo K. Lee Liisa Lehtonen and 95 more Mikael Norman Mark Adams Dirk Bassler Kjell Helenius Stellan Håkansson Junmin Yang Amish Jain Prakesh S. Shah Adele Harrison Anne Synnes Joseph Ting Zenon Cieslak Rebecca Sherlock Wendy Yee Khalid Aziz Jennifer Toye Carlos Fajardo Zarin Kalapesi Koravangattu Sankaran Sibasis Daspal Mary Seshia Ruben Alvaro Amit Mukerji Orlando da Silva Chuks Nwaesei Kyong‐Soon Lee Michael Dunn Brigitte Lemyre Kimberly Dow Ermelinda Pelausa Keith J. Barrington Christine Drolet Bruno Piedbœuf Martine Claveau Marc Beltempo Valérie Bertelle Édith Massé Roderick Canning Hala Makary Cecil Ojah Luis Monterrosa Akhil Deshpandey Jehier Afifi Andrzej Kajetanowicz Sture Andersson Outi Tammela Ulla Sankilampi Timo Saarela Eli Heymann Shmuel Zangen Tatyana Smolkin Francis B. Mimouni David Bader Avi Rothschild Zipora Strauss Clari Felszer Hussam Omari Smadar Even Tov‐Friedman Benjamin Bar‐Oz Michaël Feldman Nizar Saad Orna Flidel‐Rimon Meir Weisbrod Daniel Lubin Ita Litmanovitz Amir Kugelman Eric S. Shinwell Gil Klinger Yousif Nijim Alona Bin‐Nun Agneta Golan Dror Mandel Vered Fleisher‐Sheffer David Kohelet Lev Bakhrakh Satoshi Hattori Masaru Shirai Toru Ishioka Toshihiko Mori Takasuke Amizuka Toru Huchimukai Hiroshi Yoshida Ayako Sasaki Junichi Shimizu Toshihiko Nakamura Mami Maruyama Hiroshi Matsumoto Shinichi Hosokawa Atsuko Taki Machiko Nakagawa Kyone Ko Azusa Uozumi Setsuko Nakata Akira Shimazaki Tatsuya Yoda

10.1016/j.jpeds.2020.01.069 article EN The Journal of Pediatrics 2020-03-04

Our objective was to evaluate the temporal trend of systemic postnatal steroid (PNS) receipt in infants 24-28 weeks' gestational age, identify characteristics associated with PNS receipt, and correlate incidence bronchopulmonary dysplasia (BPD) BPD/death from an international cohort included iNeo network.We conducted a retrospective study using data 2010 2018 seven networks participating (Canada, Finland, Israel, Japan, Spain, Sweden, Switzerland). Neonates 24 28 age who survived 7 days...

10.1159/000530128 article EN cc-by-nc Neonatology 2023-01-01

Background: Tympanometry can indicate middle ear effusion in children referred for tympanostomy tube placement. In outpatient setting, objective adjunctive tools are needed to diagnose the otitis media spectrum. Methods: We enrolled and followed 515 aged 6–35 months at primary care level. compared tympanometry with pneumatic otoscopy evaluated proportions of type A, C1, C2, Cs B tympanograms relation specific otoscopic diagnoses 2206 1006 examinations symptomatic asymptomatic visits,...

10.1097/inf.0b013e31825cac94 article EN The Pediatric Infectious Disease Journal 2012-05-16

&lt;b&gt;&lt;i&gt;Background:&lt;/i&gt;&lt;/b&gt; Rates of retinopathy prematurity (ROP) and ROP treatment vary between neonatal intensive care units (NICUs). Neonatal practices, including oxygen saturation (SpO&lt;sub&gt;2&lt;/sub&gt;) targets criteria for the screening ROP, are potential contributing factors to variations. &lt;b&gt;&lt;i&gt;Objectives:&lt;/i&gt;&lt;/b&gt;&lt;i&gt;&lt;/i&gt; To survey variations in SpO&lt;sub&gt;2&lt;/sub&gt; 2015 (and whether there had been recent changes)...

10.1159/000490372 article EN Neonatology 2018-01-01

10.1016/j.jpeds.2021.02.015 article EN The Journal of Pediatrics 2021-02-15

Studies concerning spectral gradient acoustic reflectometry (SG-AR) have analyzed middle ear effusion only as 1 entity. The usefulness of SG-AR to detect specific otoscopic diagnoses otitis media in young children is unknown.Among 515 aged 6-35 months, we compared with pneumatic otoscopy and evaluated the proportions 5 manufacturer-recommended levels relation 2802 1240 examinations at symptomatic asymptomatic visits, respectively.At when angle value was >95° (level 1), healthy diagnosed 76%...

10.1097/inf.0b013e31825caf45 article EN The Pediatric Infectious Disease Journal 2012-05-16

Objectives To compare necrotising enterocolitis (NEC) prevention practices and NEC associated factors between units from eight countries of the International Network for Evaluation Outcomes Neonates, to assess their association with surgical rates. Design Prospective unit-level survey combined retrospective cohort study. Setting Neonatal intensive care in Australia/New Zealand, Canada, Finland, Israel, Spain, Sweden, Switzerland Tuscany (Italy). Patients Extremely preterm infants born 24 0...

10.1136/bmjopen-2019-031086 article EN cc-by-nc BMJ Open 2019-10-01

To compare the neonatal outcomes of very preterm triplets with those matched singletons using a large international cohort.A retrospective matched-cohort study and born between 2007 2013 in International Network for Evaluation Outcomes neonates database countries by gestational age, sex, country birth was conducted. The primary outcome composite mortality or severe morbidity (severe neurologic injury, treated retinopathy prematurity, bronchopulmonary dysplasia). Unadjusted adjusted odds...

10.1542/peds.2018-1938 article EN PEDIATRICS 2018-11-21

Pathogenic variants in the transcription factor TP63 gene cause a variety of clinical phenotypes, such as ectrodactyly-ectodermal dysplasia-clefting (EEC) syndrome and ankyloblepharon-ectodermal (AEC) syndrome. Historically, TP63-related phenotypes have been divided into several syndromes based on both presentation location pathogenic variant gene. This division is complicated by significant overlap between syndromes. Here we describe patient with characteristics different TP63-associated...

10.1016/j.ejmg.2023.104735 article EN cc-by European Journal of Medical Genetics 2023-03-03

&lt;b&gt;&lt;i&gt;Introduction:&lt;/i&gt;&lt;/b&gt; The availability of and variability in healthcare professionals neonatal units different countries has not been well characterized. Our objective was to identify variations the for preterm neonates 10 national or regional networks participating International Network Evaluating Outcomes (iNeo) neonates. &lt;b&gt;&lt;i&gt;Method:&lt;/i&gt;&lt;/b&gt; Online, pre-piloted questionnaires about were sent directors 390 tertiary international...

10.1159/000501801 article EN Neonatology 2019-01-01

Abstract Aim We surveyed care practices for critically ill very preterm infants admitted to neonatal intensive units (NICUs) in the International Network Evaluating Outcomes Neonates (iNeo) identify differences relevant outcome comparisons. Methods conducted an online survey on and with severe intracranial haemorrhage (ICH). The was distributed 2015 representatives of 390 NICUs 11 countries. Survey replies were compared network incidence death ICH born between 23 0/7 28 6/7 weeks gestation...

10.1111/apa.15069 article EN Acta Paediatrica 2019-10-20

To assess associations between 5 min Apgar score and mortality severe neurological injury (SNI) to report test characteristics in preterm neonates.Retrospective cohort study of neonates 240 286 weeks' gestation born 2007 2016 admitted neonatal units 11 high-income countries.5 score.In-hospital SNI defined as grade 3 or 4 periventricular/intraventricular haemorrhage periventricular leukomalacia. Outcome rates were calculated for each compared after adjustment. The diagnostic ORs value from 0...

10.1136/archdischild-2021-322230 article EN Archives of Disease in Childhood Fetal & Neonatal 2021-11-15
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